Controller



J. M. BROWN.

I CON TRO LLER.' APPLICATION FILED NOV-19,1917.

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H I 5 mm R% m d a m J m W P s 1 2 m 4 w 1 y ATTORNEY UNITED STATES PATENT OFFICE.

JAMES IVL BROWN, 0F PITTSBURGH, PENNSYLVANIA, AS SIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

CONTROLLER.

Specification of Letters Patent.

Patented June 27,1922.

Application filed November 19 1917. Serial No. 202,842.

To all whom it may concern Be it known that 1, James M. BROWN, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a One object of my invention is to provide a controller for a circuit interrupter that shall have means for preventing the interrupter from being held in its closed position when an overload obtains thereon.

Another object of my invention is to provide an attachment for the controller of a circuit interrupter that shall be adapted to disconnect the movable member of the controller from its operating handle under predetermined conditions.

A further object of my invention is to provide a device of the aboveindicated character that shall be inexpensive to construct, simple to connect and effective in its operation.

In practicing my invention, 1 provide an attachment that is adapted to be inserted between the operating handle of the controller and the movable drum of the same for the purpose of disconnecting the drum from the handle to permit the same to return to its in operative or oil position when an overload traverses the interrupter that is to be con trolled. By the use of such a device, the automatic features of the interrupter may function properly.

Figure 1 of the accompanying drawings is a side view, partially in elevation and partially in section, of a controller embodying my invention; Fig. 2 is a view taken along the line IIII of Fig. 1; Fig. 3 is a view taken along the line IIl-III of Fig. 1, Fig. 41 is a diagrammatic view of an electrical circuit embodying my invention; and Figs. 5, 6 and 7 are detail views of certain of the latching members.

An electrical circuit 1 is provided with an interrupter 2 having a closing electromagnet 3 and a trip-ping electromagnet 4. A handoperated controller 5 is provided for controlling the circuit of the electromagnets 3 and t under normal conditions. A relay 6, that is operatively connected to a current transformer 7, is adapted to effect the energization of the electromagnet 1 when an overload traverses the circuit 1, and an attachment 8 is provided for moving the corn troller to its off position when an overload traverses the/circuit 1 to thus ole-energize the electromagnet 3 and permit the electromagnet 41 to trip the interrupter.

The controller 5 comprises a casing 9, stationary contact members 10, 10a and 10K and a rotatable drum member 11 upon which movable contact members 12 are mounted. One end 'of a spring 13 is connected to the member 11 and the other end of the spring is connected to the casing 9. The spring'll is adapted to normally hold the movable member 11 in its off or inoperative position.

The attachment 8 comprises a casing 1 1, a sleeve or tubular member 15 that is operatively connected to a handle member 16, a sleeveor tubular member 17 that is connected through a pin 18 to the rotatable member 11. The sleeve 17 is disposed around the sleeve 15 and'is provided with a segmental flange 19. I A yoke member 20 is secured by screws 21 to the sleeve 15 and is provided with a projection 22 that is adaptedto engage one shoulder of the segmental flange 19. A pivotally mounted member 23 is mounted on'the yoke 20 and has a projection 24 thereon for engaging the other shoulder of the segmental flange 19. A movable core member 25 is disposed in the sleeve 15 and is normally held in its outermost position by a spring 26. A winding 27 is disposed around the sleeve 15 for the purpose of actuating the core member 25 when suflicient current traverses the circuit 1 to ac tuate the relay 6. A pin 28, mounted in the core member 25, extends through a slot in the sleeve 15 and into the hole 23a (Fig. 7) of the pivotally-mounted member 23 for the purpose of actuating the same when the winding 27 is energized to thus so rock the member 23 as to cause its projection to disengage the shoulder of the flange 19.

If it is desired to manually operate close the interrupter 2, the handle 16 is turned, and, since the projections 22 and 241 engage the opposite faces of the segmental flange 19,

any movement of the sleeve 15 will be transmitted through the sleeve 17 and the pin 18 to the movable member 11. hen one of the contact members 12 engages the stationary contact members 10 and 10a, the electromagnet 3 will be energized from a source 29 of electromotive force to thereby close the interrupter 2. It the handle be moved in the opposite direction, the contact members 10 and 10?) are bridged to close the circuit through the coil and thus trip the interrupter 2. \Vhen the handle 16 is released, the spring 13 will cause the movable contact members 12 to return to oil position, or to such position that, the winding of the actuating electromagnet 3 will be ale-energized.

llan overload traverses the circuit 1, after the handle 16 is moved to its closed position, the relay will operate to energize the winding 27 and also the winding oi the tripping electromagnet t. When the winding 27 is energized. the movable core member actuates the pin 28 to cause the pivotally mounted member to so move the projection i l t out of engagementwith the edge of the seg mental flange 19 as to permit the spring 13 to turn the sleeve 1'? and, consequently, the contact members 12 to their off positions or such position that the electromagnet 3 is deenergized. Thus, the handle 16 is entirely disconnected from the controller 5 to preclude the operator from holding the interrupter in its closed position when an overload obtains on the same.

The attachment 8 may be applied to any of the ordinary well-known types ol. handoperated controllers and not limited to the particular structure illustrz'tted, as many modifications may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

I claim my invention 1. In a circuit-interrupting system, the combination with a circuit interrupter and ClOSing and tripping electromagnets therefor, of a controller for the electromagnets, and means for releasing the handle of the controller and for returning the controller to its off position when an overload obtains on the interrupter.

2. In a circuit-interrupting system, the combination With an electrically-operated circuit interrupter, of a controller therefor, and means for releasing the handle of the controller and for returning the controller to its off position when an overload obtains on the interrupter.

The combination with an electrically operated circuit interrupter, of a remotely disposed controller therefor, and means for disconnecting the handle and for returning the controller to its off position to prevent the interrupter being held closed if an overload obtains thereon when the controller is actuated to close the interrupter.

at. The combination with an electrically operated circuit interrupter, and a controller therefor, or an attachment for the controller comprising means for disconnecting the handle from the controller and for returning the controller to its off position when an overload traverses the interrupter at the time the controller is actuated to close the interrupter.

5. The combination with an electrically operated circuit interrupter, and a manually actuated controller theretor, of a unitary attachment for the controller comprising means for returning the controller to its off position independently of its operating handle when an overload traverses the interrupter as the controller is actuated to close the interrupter. I

(3. The combination with a controller for an electrically operated circuit interrupter, oil a unitary attachment therefor disposed between the actuated and actuating members of the controller for automatically discon necting the same from each other when an overload traverses the circuit interrupter, andmeans for returning the controller to its off position when it has been disconnected.

In testimony whereof, I have hereunto subscribed my name this 29th day of Oct. 1917.

JAMES M. BROWN. 

